Effects of plant hybridization on herbivore-parasitoid interactions |
| |
Authors: | Robert S Fritz Sarah E McDonough Anne G Rhoads |
| |
Institution: | (1) Department of Biology, Vassar College, Poughkeepsie, NY 12604, USA fax: 914-437-7315; e-mail: fritz@vassar.edu, US |
| |
Abstract: | We studied the effects of host plant hybridization on the survival and mortality of the leaf-mining moth Phyllonorycter salicifoliella on hybrid and parental willow plants in the field and in a common garden experiment. P. salicifoliella survival differed significantly among three willow taxa in the field in 1994 but not in the field in 1995 or in the common
garden. Parasitism by eulophid wasps differed significantly among taxa in 1994 and appeared to account for the variation in
their survival. In the field in 1995, host feeding predation varied significant among taxa. The theory of tritrophic interactions
predicts that plant genotype can affect natural enemy impact, and this study supports this prediction. Significant variation
in survival and eulophid parasitism was also found among genotypes within taxa in the field in both years and in the common
garden experiment. The common garden results show that genetic differences in plants affect the herbivore-parasitoid interaction.
Variation among years in the patterns of survival and causes of mortality among field plants suggest that genotype by environment
interactions may be important.
Received: 1 March 1996 / Accepted: 4 November 1996 |
| |
Keywords: | Berbivore Leafminer Parasitoid Plant hybrid Tritrophic-level interaction |
本文献已被 SpringerLink 等数据库收录! |